HYSTERIACEAE 57 



b. Perithecia smooth 



(i) Perithecia covered by the epidermis 



Hypodermopsis 17: 908 

 (2) Perithecia erumpent or superficial 



(a) Perithecia carbonous Hysterium 2 : 743 



(b) Perithecia coriaceous Tryblidiella 2 : 757 

 2. Asci many-spored, perithecia subcoriaceous 



Baggea 2:760 



II. Edges of cleft very thin, closely connivent 



1. Asci 4-spored ; perithecia subcarbonous, striate 



Ostreium 2: 765 



2. Asci 8-spored; perithecia somewhat membranous, fragile 



Mytilidium 2 : 760 



Hyalodictyae 



2:772, 9:1116, 11:389, 14:717, 16:668, 17:909 

 Spores muriform, hyaline, ovoid to oblong 



I. Perithecia separate 



1. Perithecia carbonous, erumpent; spores without mucus 



Gloniopsis 2: 772 



2. Perithecia membranous, innate ; spores with mucus sheath 



Hysteropsis g:iii8 



II. Perithecia in a lenticular, radiate stroma Mendogia 16:669 



Phaeodictyae 



2:776,9:1119, 11:389, 14:717, 16:668, 17:912 

 Spores muriform, dark, ovoid to oblong 



I. Perithecia carbonous or corneo-carbonous, firm 



Hysterographium 2:776 



II. Perithecia membranous, thin Graphyllium 16: 1145, 17:913 



Scolecosporae 



2:784,9:1123, 11:389, 14:719, 16:669, 17:913 

 Spores bacillar to filiform, hyaline or dark 



I. Spores 2-5 times shorter than the asci ; perithecia membranous 



Hypoderma 2: 784 



II. Spores filiform, nearly as long as the asci 



1. Perithecia horizontally elongate, rarely ampulliform 



a. Perithecia elongate 



(i) Perithecia membranous, applanate Lophodermium 2:791 



(2) Perithecia subcarbonous, conchiform 



Lophium 2 : 799 



(3) Perithecia subcoriaceous, depressed 



(a) Perithecia subcorneous Sporomega 2:801 



(b) Perithecia subcarnose Colpoma 2:803 



b. Perithecia subspheroid or ampulliform 



(i) Perithecia depressed spheroid, cleft longitudinal 



Ostropa 2 : 804 



